Tuning dial for radios



June 28, 1932- .1. .1. WARREN TUNING DIAL FOR RADIOS FiledlApril 17, 1951 1 1 ...1 HMIIMWIMIIMMMVIU HNI.'

Patented .nine 28, 1932 UNITEDA 'STATES'.

PATENT OFFICE This invention relatesv to tuning dials for radios, and in particular to improvements in the drum carrying the station markings and the Window through whigh the markings are viewed, and is a continuation in part of my' pending application, serially numbered 504,883, led December 26, 1930.

It is an object of this invention to provide a dial or having station marlnngs ario ranged thereon in such a manner that they can be easily read anda greater number of.

, characters can be laced on the diall than is possible with the ial now in use.

Another object of this invention is to prol5 vide means to successively position the station markin s arran ed spirally on a drum in avvindo'wvv en the rumis'rotated.

A further object of this invention is .to provide a Window having a shutter arranged :o thereon in such a manner that it is moved lateral on rotation of the drum. l

These and other obects which are readily apparent to those s ed in this particular art are accom lished by means of this n inventiomone em diment of which is described in the following specification and illustrated in the accompanying drawing, wherein; v

Figure 1 is a fragmentary sectionai vievv othrough a radio device showing the invenf tion.

Fi 2 .is a view in section taken on line H- "of Figure 1.

Fig. 3 isa view inl section taken' on line 5 11i-Hl of Fig. 2; and

Fig. 4 is a partialview in front elevation oi the radio cabinet.

Referring to the drawing in detail, des'- ignates a shaft journaled in brackets 11 which 0 are secured to a portion of the radio device. One end of the shaft 10 is connected by gears 12to a shaft 13 which extends through the front Wall 14 of the radio device, and has a knob 15 secured thereto through which the 5 shaft 10` is rotated. The other end of the shaft 10 is connected by suitable gearing (not shown with a shaft which operates the tuning con ensers with which it is synchronized. The shaft 10 has a circular disc 16 D mounted thereon which forms the hub of a `translucent so thatl a lampy 24 positioned in tuning, dial or drum 17 which carries the station markingsl or other indicating characters.l The station markin are arranged in a spiral lon the periphery o the drum so that greater space may be obtained between the station markin consequently permitting the markings to of larger size than is possible with j the dial now. in use, and making them readily visible. The station markmgs may be formed directly on the drum or on a tape wound in a spiral around the periphery of the drum. y 1. p

The station markin s or characters on the drum 17 are viewed t rough an o ning or Window 18 which (is formed in the ont wall 14 of the radio cabinet, and which extends the full `width of the drum; 'In order'that only one station marking will appear in the opening 18 at any one time, a shutter 19 is provided which has an openin 20 which reg; isters with the opening 18 an of such widt Y that one station marking only, on the drum 17, is visible at one time. The shutter 19 is slidably mounted in brackets 21 secured to the inner face of the wall 14. v5 lin order that each of the spil-ally arrangedl station markings on the drum 17 maybe successivel viewed through the openings 18* and 20, t e shutter 19 is provided with grooves 22 which receive a spiral rib 23 formed on the circumference of the drum. As the drum 17 is rotated in either direction, the ribs 23 impart lateral or endwise movement to the shutter 19 causin it to move back and' forth across the win ow 18 and position the successive station markings 'or characters in the opening 2O of the shutter.

The drum 17 having the station markings arranged spirally thereon is transparent or side the drum behind the opening 20 in the shutter 19 Will illuminate the characters as jthev appear in the window and make them radially visible to thel operator.

The lamp 24, which is movable laterally so that itwill always be positioned behind the opening 20 in the shutter 19, 'is mounted in a plate 25 which is secured to a nut 26 carried on a sleeve 27 which is fastened on the shaft 10. The nut 26 has an internal '100 spiral thread 28 which meshes with an external spiral thread 29 formed on the sleeve 27 so that as the shaft 10 and sleeve 27 are rotated the plate 25 will be caused to move back and forth on the sleeve. which is secured to one of the brackets 11 and extends through an opening formed in the plate 25 and prevents the plate from turning with the sleeve 27. The thread between the nut 26 and the sleeve 27 is so formed that the light 24 is always maintained in position behind the opening 20 in the shutter 19 therefor. As the drum 17 is rotated, the plate 25 will move longitudinally 15 on the sleeve 27 and maintain the light 24 directly behind the opening 20 in the shutter 19 which is being moved laterally across the window 18.

While I have described one embodiment of my invention it is to be understood that this invention is not limited to the construction herein speciically illustrated and can be embodied in other forms without departing from the spirit of this invention or the scope of the appended claims.

What I claim as new and desire to secure as Letters Patent is:

1. In a radio device, the combination of a closure having a view opening there'- through, a light emitting drum mounted for rotation within said closure and having station markings arranged spirally thereon, a source of light within said drum and opposite said view opening, and means for moving said light source lengthwise of said drum as the same is rotated.

2. In a radio device, the combination with a closure having a window formed therein, of a translucent drum mounted for rotation in said closure and having station markings spirally arranged thereon, ribs extending from the periphery of said drum, a shutter having an opening therein for viewing the marking on said drum, and provided with grooves therein for cooperating with the ribs on said drum, a source of light within said drum for illuminating the markings in said view opening, means for rotating said drum for causing lateral movement of said shutter relative to said window to successively po- 'f'sition the spirally arranged markings in said view opening, and means associated with said drum for moving said light laterally.

3. In a radio device, a translucent druml mounted for rotation and having station markings spirally arranged thereon, a window through which said markings are viewed, a shutter for partially closing said Window, a light for making visible the markings through said window, and means associated with said drum for causing lateral movementof said shutter and light relative to said window so as to view successively the spirally arranged "station markings.

4. In a radio device, a rotatable translucent A shaft 30 drum, a light mounted in said drum, and means for causing lateral movement of said light relative to said drum on rotation of said drum.

5. In a radio device, the lcombination with a closure having a window formed therein, of a movable shutter for said window and hav- 'ing a view opening therein, a rotatable shaft in said closure, a source of light slidably mounted on said shaft and opposite the view opening in said shutter, a light emitting drum mounted on said shaft and surrounding said light and having characters spirally arranged thereon, one of which is visible through the view openin in said shutter, meansl for rotating said rum, means associated with said drum for moving said shutter across said window as the drum is rotated whereby said spirally arranged characters are successively visible through said view opening, and means associated with said shaft for moving said light source endwise on said shaft for maintaining the same opposite said view opening.

6. In a radio devlce, the combination with a closure having a window formed therein, of a movable shutter for said window and having a view opening therein, a source of light within said closure opposite the view opening in said shutter, a light emitting drum within said closure and surrounding said light and having characters spirally arranged thereon, one of which is visible throu h the view opening in said shutter', means. or rotating said drum, means for moving said shutter across said window as the drum is rotated whereby said spirally arranged characters are successively visible through said.

view opening, and means for moving said light source as said drum is rotated so as to maintain the same opposite said view openmg.

7. In a radio device, the combination .with a closure having a window formed therein, of a movable shutter for said window having a view opening'therein, a source of light within said closure opposite the view opening in said shutter, means for moving said s utter across said window, and means for moving said light source so as to maintain the same opposite said view opening. `4

8. In a radio device2 thexcombination with a closure having a window formed therein, of a movable shutter foi-said window and having a view opening therein, a source of light within said closure o posite the view opening in said shutter, a light emitting drum within said closure and surrounding said light and having characters spirally arranged thereon, one of which is visible through the view opening in said shutter, means for rotating said drum, means forv movingx said shutter across said window as the drum is rotated whereby said spirally arranged characters are successively visible through said view opening, and said means including a megan L.

irai rib formed on the peri hery of said y 9. In a radio device, the combination withA a closure having a window formed therein,

of a movable shutter in said window having a view opening therein, a source oflight with l in said closure and behind said view openin and means for moving said shutter and said light source relative to the windown said closure.

In testimony whereof, I have hereunto subscribed my name this 15th da of A ril, 1931.

JOSEPH WA REN, 

